Skype Question:

The first thing to do is check the Heartbeat blog to make sure Skype's services are all running well. If there are no issues reported there, it is time to look a little closer to home for the source of the problem.
From shaky internet connections, to installation problems and firewalls, there are many potential causes for connection issues with Skype. The Skype Support team have put together a guide to solving the most common connection problems.